I keep getting this error when I try to use the wire library:
In file included from ../Mag_wrapper.cpp:23:0:
C:/Users/slb0494/Desktop/LCD/Wire.cpp:26:27: fatal error: utility/twi.h: No such file or directory
#include <utility/twi.h>
This particular error is in Matlab, but I got the same error when I tried to execute the below code using the Arduino IDE. It is interesting to note that the below code only gave me the error when I used the Due, but the Uno worked fine. Any idea what the problem is here?
/**
* TCA9548 I2CScanner.pde -- I2C bus scanner for Arduino
*
* Based on code c. 2009, Tod E. Kurt, http://todbot.com/blog/
*
*/
#include "Wire.h"
extern "C" {
#include "utility/twi.h" // from Wire library, so we can do bus scanning
}
#define TCAADDR 0x70
void tcaselect(uint8_t i) {
if (i > 7) return;
Wire.beginTransmission(TCAADDR);
Wire.write(1 << i);
Wire.endTransmission();
}
// standard Arduino setup()
void setup()
{
while (!Serial);
delay(1000);
Wire.begin();
Serial.begin(115200);
Serial.println("\nTCAScanner ready!");
for (uint8_t t=0; t<8; t++) {
tcaselect(t);
Serial.print("TCA Port #"); Serial.println(t);
for (uint8_t addr = 0; addr<=127; addr++) {
if (addr == TCAADDR) continue;
uint8_t data;
if (! twi_writeTo(addr, &data, 0, 1, 1)) {
Serial.print("Found I2C 0x"); Serial.println(addr,HEX);
}
}
}
Serial.println("\ndone");
}
void loop()
{
}